Adjustments on front shocks

I just picked up a Felt Nine 60...it's got Rockshox XC30's on it. There is an adjustment on top and a rabbit/turtle adjustment on the bottom...Assume the bottom is for rebound and how quickly or slowly the shock returns to normal, right? For the top one, I assume it's for how much travel the shock has on impact, right? I am 6'2" 210 and dont like the spongy feel...should I increase the shock travel closer to the max on the top and put the bottom setting closer to the turtle?